JP3002851U - Printer - Google Patents

Abstract

(57) [Summary] [Object] An object of the present invention is to provide a printing apparatus which can produce clear printing with less noise during printing. [Structure] A ring (1) in which a plurality of characters are projected on the outer peripheral surface.
And a pressing roller (7) arranged in the vicinity of the character ring (1) via the ink ribbon (2) and the paper (3), and driving the pressing roller (7) so as to swing by a certain stroke. Driving means and a belt (8) having both ends fixed at predetermined positions and wound around the pressing roller at least once.
And is configured to press the character ring (1) by the pressing roller (7).

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a printing device, and more particularly to a printing device that prints by pressing a sheet of paper on a plurality of printing characters protruding from the outer peripheral surface of a printing wheel by a pressing roller.

[0002]

[Prior art]

 As a conventional printing device, as shown in FIG. 3, an ink ribbon 2 and a paper 3 are arranged on a ring 1 having a plurality of characters projected on the outer peripheral surface, and a flying hammer 4 impacts the type ring. There is a method of printing on paper by doing so.

[0003]

[Problems to be solved by the device]

 However, the above-mentioned conventional device has a drawback in that noise may be generated during impact printing. An object of the present invention is to provide a printing device that produces clear printing with less noise during printing.

[0004]

[Means for Solving the Problems]

 The printing device according to the present invention comprises a character ring having a plurality of characters projected on the outer peripheral surface thereof, a pressure roller arranged near the character ring via an ink ribbon and paper, and a constant stroke of the pressure roller. It is composed of a drive means for driving so as to swing, and a belt having both ends fixed at predetermined positions and wound around the pressing roller at least once. The pressing roller presses the character ring. It is something. Further, the driving means includes a stepping motor and an arm having one end fixed to the rotation shaft of the stepping motor and the other end to which a pressing roller is rotatably attached. Further, the belt is fixed at a predetermined position via a spring.

[0005]

With the belt 8, the rotation of the pressing roller, which is oscillated by the driving means for a constant stroke, is restricted. The pressing roller 7 rotates while moving, but since the amount of rotation is equal to the amount of movement, it is possible to obtain a state in which the surface of the paper 3 moves while rolling and the printing portion presses the character loop. Therefore, at the time of printing, the rolling movement presses the roller so that noise is reduced. Further, the pressing roller 7 does not generate a force that causes a slip in the traveling direction between the pressing roller 7 and the sheet 3 in a stationary state due to the presence of the belt 8. Therefore, since the belt 8 is provided, when printing, the paper 3 is not displaced between the ink ribbon 2 and the character wheel 1, and clear printing can be obtained.

[0006]

【Example】

 An embodiment of the printing apparatus according to the present invention will be described with reference to FIGS. 1 and 2. 1 is a schematic configuration diagram, FIG. 2 is a partial detailed view of FIG. 1, (A) is a front view, and (B) is a side view. The same components as those of the conventional device in FIG. 3 are designated by the same reference numerals. In FIG. 1, 5 is a stepping motor, 6 is an arm, 7 is a pressing roller, 8 is a belt, and 9 is a spring. The stepping motor 5 rotates left and right by a predetermined rotation angle, and one end of an arm 6 is fixed to the rotation shaft 5a. A pressing roller 7 is rotatably attached to the other end of the arm 6 by its shaft 7d, and the pressing roller 7 swings left and right through the arm 6 as shown by an arrow by the left and right rotation of the stepping motor 5. To be driven. As shown in FIG. 2, the pressing roller 7 includes a large diameter portion 7a, a small diameter portion 7b, a step portion 7c, and a shaft 7d. The large diameter portion 7a serves as a pressing portion for printing, and the shaft 7d serves as an arm 6. The belt 8 is rotatably attached to the other end, and the belt 8 is wound around the step 7c for one rotation. Both ends of the belt 8 are fixed to predetermined places via springs 9. The spring 9 is for applying a constant tension to the belt 8.

With such a configuration, the printing operation is performed as follows. First, the paper 3 is inserted between the ink ribbon 2 and the pressing roller 7, and the character wheel 1 is rotated by a character selection mechanism (not shown) to select a desired type, and the character is stopped at the printing unit. When the stepping motor 5 swings the arm 6 whose one end is fixed to the rotary shaft 5a, the pressing roller 7 attached to the other end of the arm 6 so as to freely rotate for a certain stroke accordingly. Rock. When the pressing roller 7 moves to the printing portion, the paper 3 is pressed by the pressing roller 7 via the ink ribbon 2 against the printed characters of the loop 1 to perform printing. Therefore, at the time of printing, it is pressed by rolling movement, so there is less noise. While the character wheel 1, the ink ribbon 2 and the paper 3 are stationary during printing, the character wheel 1 rotates to select the next desired type after the printing is completed, and the ink ribbon 2 and the paper 3 are rotated. Are respectively fed by an ink ribbon feeding mechanism and a paper feeding mechanism (both not shown) by a predetermined amount, and the pressing roller 7 is stopped at a predetermined position other than the printing portion as the stepping motor 5 is stopped, and the next printing is performed. It will be in a standby state for.

In the above operation, the rotation of the pressing roller 7, which is originally attached to the other end of the arm 6 so as to freely rotate, is restricted by the belt 8. Although the pressing roller 7 rotates while moving with the swinging rotation of the arm 6, the amount of rotation is not equal to the amount of movement, so a state in which the surface of the sheet 3 moves while rolling can be obtained. At this time, due to the presence of the belt 8, the pressing roller 7 does not generate a force that causes a slip in the traveling direction with respect to the sheet 3 in a stationary state. If the belt 8 is not provided, slippage may occur between the pressing roller 7 and the paper 3 to cause lateral misalignment, resulting in unclear printing. However, the printing apparatus of the present invention includes the belt 8. During printing, the paper 3 does not shift between the ink ribbon 2 and the character wheel 1, and clear printing can be obtained.

Since the pressing roller 7 is restricted in rotation by the belt 8 and always presses the ring 1 at a constant position, it may be worn depending on the material of the pressing roller 7 and the ring 1. However, in that case, a sheet made of an appropriate material for reducing wear may be arranged between the pressing roller 7 and the sheet 3.

[0010]

According to the printing apparatus of the present invention, noise is reduced because the pressure roller presses against the rolling movement of the pressure roller during printing, and when the pressure roller presses, the paper, the ink ribbon, and the letter loop are displaced. Since there is no need for printing, clear printing is possible.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an embodiment of a printing apparatus according to the present invention.

2 is a partial detailed view of FIG. 1, (A) is a front view, FIG.
(B) is a side view.

FIG. 3 is a schematic configuration diagram of a conventional printing device.

[Explanation of symbols]

 1 character ring 2 ink ribbon 3 paper 4 flying hammer 5 stepping motor 6 arm 7 pressure roller 8 belt 9 spring

Claims (3)

[Scope of utility model registration request] 1. A character ring (1) having a plurality of characters protruding from the outer peripheral surface thereof, and a pressure roller arranged in the vicinity of the character ring (1) with an ink ribbon (2) and a paper (3) interposed therebetween. (7),
The pressing roller (7) is composed of a driving means for driving the pressing roller (7) so that the pressing roller (7) is swung by a certain stroke, and a belt (8) having both ends fixed at predetermined positions and wound around the pressing roller at least once. A printing device characterized in that the roller (7) is configured to press the character ring (1). 2. The printing apparatus according to claim 1, wherein the driving means has a stepping motor (5), one end of which is fixed to a rotation shaft of the stepping motor (5), and the other end of which rotates a pressing roller (7). A printing device including an operably mounted arm. 3. The printing device according to claim 1, wherein the belt (8) is fixed at a predetermined position via a spring (9).